Update: As of 10:59 a.m., all southbound lanes on Interstate 93 in Quincy at Exit 10 have reopened, according to MassDOT. The northbound and southbound sides of Interstate 93 have reopened at Exit 3 in Milton after flooding caused by heavy rain led to a closure,

Downpours led to flooding on Interstate 93 in Milton and Quincy, Massachusetts, bringing the morning commute around Boston to a crawl Thursday.